I18nLanguages

An i18nLanguage resource identifies an application language that the YouTube website supports. The application language can also be referred to as a UI language. For the YouTube website, an application language could be automatically selected based on Google Account settings, browser language, or IP location. A user could also manually select the desired UI language from the YouTube site footer.

Each i18nLanguage resource identifies a language code and a name. The language code can be used as the value of the hl parameter when calling API methods like videoCategories.list and guideCategories.list.